I need job hunting advice!!!?

So basically I need to find a job. Im almost 20 in march and havent worked since i was 18. I worked at this photography place my brother's gf worked at. She pretty much got me in without even an interview or anything. It was my first job but i ended up quitting after 3 months because it was not what i expected. The manager kept comparing me to my brothers girlfriend and I felt so stressed out because taking childrens pictures was not an easy task for me..i thought children werent going to be a problem, but they are hard to make them cooperate behind the camera..sometimes they just cry!! lol...bu i did quite good with sales though..but unfortunately i had to do both things. I also quit because i was about to start college and i didnt want that stress from work to interfere. Now i know i want to work and im kind of thinking of going into something with my major..my major is early childhood education. Im good at teaching and i love teaching little kids. now im wondering if i can apply to a daycare or school? how do i apply? how many credits would i need, or does it all just depend? but besides that anywhere would be good. but it would be nice to work in something related to my field. also if i apply anywhere should i include the photography place? since its only three months it might look bad? like they might not want to hire me. i also worked at this non-profit organization (summer program)i tutored young kids. should i include that as well? please help me it will definately help me with my job hunting. Since i dont really know what looks good and what doesnt, what i need and what i dont need. I would very much appreciate the help (: